Insert for concrete construction.



- W. T. ENGLISH.

INSERT FOR CONCRETE CONSTRUCTION.'

APPLIUATION FILED mm3, 1910.

1,110,429'. vBamm sqm 151914.

M'rzess'es.: 'l @venan 2f- William 775973.15822 WXLLIAM fr. ENGLISH, QEHYD PARK, MAssAoHUSErTs.

INSERT FOR CONCRETE CONS'JRULC'I'ION..`

nude-ea.

' Snecicati'on of Letters Batent. Patnted Sept. 15, 1914i.l

Appncatitnied January 3,1910. u serial Nefsasau.

F all'whom t may concern 'Be it knownthat I, TILLIAM T. ENGLISH,

a. citizen ofthe United States, and resident of Hyde Park, in the county\of Norfolk and State of Massachusetts, have invented certain new and useful Improvements in' Inserts for Concrete'vConstruction, of which the following is a full, clear, and exact specification; 'Y

`This invention relates to inserts for use in connection with concrete construction,.the

-object being to provide. a suitably hard and firm seat for receiving'a nut or the head of' a bolt for use in bolting or clamping brackets, hangers, or vother parts which are to be removablyand yet firmly 'attached to the surfaces of the'concret-e,

The concrete itself is'gener'ally not sufli'ciently hard or tough to hold'I a nut or the' head of' a bolt. y It is moreover difficult to predetermine the exact desired position of any bolt or of a set of bolts.. Hence it -is desirable to provide an insert, constituting a .receiving seat or socket of firm andstrong material. preferablyof metal, which may be I firmlyl` embedded inthe concreteI during its construction, and which will-permit bolts or nuts Ato be subsequently' introduced and allow them .a 'reasonable latitude Yof lateral.

adjustment while holdingthem `vand their appurtenant objects securely in lposition when fasteuedto place.

Figure l of the drauf'ingsis'an end view of one of these inserts, inthe form preferred when made of iron or similar metal, illustrating` the manne-r of attaching itin position for embedding it in the' concrete. Fig. Q is a side view of the'insert projected from Fin'. 1. Fig. 3 is a cross-sectional end View showingthe insert embedded in the concrete and showingthe head of a bolt in position in the insert. F 1 isa-side view projected from Fig; 3, in sectiontaken sub-- stantially.' through the llongitudinal center of the insert. illustrating also thel manner ot' inserting' the bolt head. Fig. 5 is a face view of the insert; showinga bolt located at one end of the slot.

lu the emlmdiment of this invention ill-usfrated -iu the accompanying.,r drawings the insert S is of a form suitable for being made in cast iron or malleable-iron. The body portion .is of box-like form having an inner cavity S) for receiving :asnut or the head of a bolt 10. The outeisides 11 of the body are inclined, forming a Wedge or keystone shape for more securely locking it into the concrete. The ends 12 are herein shown to be parallel; but obviously these may also be inclined likeV a keystone, for added strength or for any other desired purpose. For additional firmness and security the body is provided with. an extension, consisting of a base 13 .connectedwith the body in any suitable way, as by the'ba-rs 14, suitable spaces being preferably letti between and 16', or to4 allow the concreteto. flow or pack under the base .13,- as shown in Figs. Bandt. The underneath :tace 15 ofthe' insert is herein shown to be flat, but obvious1y -it may be curved in any desired way :inv conformity l. i. with the general face'of 4the concrete, or-with around them for weight distributing rods 'I the surface 'tobe attached to the insert.l The i face is' provided with aslottedfaperture 17,. .oi a width suitableforreceiving the-)body 1S of the bolt,l thisv slot, in conjunctionwith the innerspace 9, formingaTfslot which is elongated to any desired extent," acmrding 'to the amounty of adjustment required., or according. to the expected variations in setting'the inserts inposition the concrete. The in nerfsid'e Walls, 19 of the space 9 form A lguiding"surfaces suiciently close together to prevent 'the nut `or the head of the bolt from turning around when being tightened.

Thelshiould'ers. 20' at fthe sides ofthe slot 1T Support the under Surfaces of the Ibolt hea'd or nut, and these 'shoulders are inter-` rupted at a suitable portionof the slot by ,means of oppositely disposed recesses 21, to

permit the nut or the bolt head to be entered wise of the slot 117 is AslightlyWider .thanthe width of the nut vor bolt head to beer- -cr removedthrouejh the face of the-insert. `The laterallwidth of thesel recessesfcrossployed.; .buttheir width in a direction'- lengthwise 011 theslot Ais less vthan tht-.width of the nut or"b' ilt head,"s0' 4thatthe latter must be inclined at an' angle to its resting j position, asshownin'Fig. 4, in order to admitit through the recesses. The-nut or bolt .when turned to its resting position, indicated' by the dottedunes in. Fie 4,a1ways rests 'f uponsorne' portion of the shoulders 20, the recessed interruptions being too narrow to allow it to drop out 'or be drawn out when in that position.

The position of the recesses21-*lengthwise of the Slot should be adapted to the working requirements. In the present instance they are shown about midway of the length of' recesses at -or near one end oitheslot..

In Figfl is shown a' method of placing or loca-ting the insert prior-'to casting the concrete aroi.ind"'it.. rl'he yinsert is attachedto the inner faceof a board l24 or Jiorm, which may be -a part of the mold or form for de- 'lining'. the aceot the'concrete. This may clamped to tlie'board or forni. lnstead of.

conveniently be done. by 'boring a hole through the board at the approximate point Where it is desired to locate the bolt which is to be used in the insert. Through this hole a temporary holding bolt 25 is placed, -Witlrits head holding the insert in position,

the boltQzS, or in' addition thereto, the insert` may be provided with projecting ears notched or perforated to receive nai-ls QT by 'means of 'which the insert -may be secured to the board 24 'or inner face oic the'form. The reinforcing rods 16, if employed, may

' then be inserted. 'After the ins rt isrthus secured, the concrete is put into t e form, flow.-

ing andpacliing closely around-the insert,

Ias shown in `l'iigs. S'and 4. After the fcony crete is set and .the form removed, bolts or nuts `may Abe put in place in the insert, as

lillust-rated in Figs; 3- ande, tor attaching hangers, brackets, stringere, or any other structures or obgects., The bolts or nuts may 'be removed at any time, and be replaced by other bolts or nuts. The length'- of .the slot permits thev bolt to be 'adjusted laterally from the approximate position lirstdetermined, this being frequently desirable forY example in putting up hangers for shafting,

to enable any of the'hange'rs' toibe-` adjusted--v into alinement.

The dimensions of theinsert may be modilied according to the material employed and according to the service required. The face of the insert'may be ilush With the surface of the concrete, lor it may project therefrom. Thusin various Ways which vwill be obvious to those Who may make or employ these inserts they may lie-modified in form, dimensions, and position., Ato suit ldifferent requnements',` or ditleaent conditions of service. y l f It being obvious that these' inserts vmay be adapted to receive either a'nut,or the head of a bolt, the terinfbolt headnwhich for conciseness is employedb 'in theffollowing claims, is intended to include a nut, V'and other lequivalent shouldered'members that may be employed for clampingy hangers, stringers, orv` other objects to the insert.

The reinforcing rods' '16'may be of any suitable size, form and material.. They may be-utilized to assist in locating and holding thefinsert,` While the concrete is being' east around them, and thereafter serve to reinforce the inserts .andthesurrounding concrete, 'distributing .over a larger larea of the concrete the'load sustained' by the inserts.

The rods 16 and the apertures of the inserts through which they .passl may be adapted to 'lit each other more or less closely, according tothe requirements. Some of these`rein` forcing rods may also be used under the outer shoulders or lange's of the base, as also shown in Fig. l.

I claim as my invention 1. An insert for concrete construction Vfor removably'receiring a bolt head, having shoulders' for engaging beneath the bolt head, the continuity of said shoulders being interrupted byoppositely disposed recesses which'in the crosswise direction admit the bolt head whenv inclined and in a direetion lengthwise of the shoulders are shorter than the sides of the bolt head, whereby the head of the bolt may be inserted to place throuoh therecesses by incliningthe bolt to the t irection of the length of theshoulders, and

.whereby the bolt vhead when 'in holding position presents ,engaging surface to .the

shoulders longer than the interrupting length of the recesses.

2. A metallic insert'for concrete construe `t1on,for'removably seating and supporting a square-headed bolt, comprising a hollow4 'elongated bodyhaving an elongated T slot in its lower face for receiving'tlie bolt head, the supporting shoulders of the T slotbeing vinterrupted by oppositely disposed recesses for Aa portion of their length less than th'- side ofthe'bolt head, and of a depthsutl.v cient to admit the bolt head transrersely the shoulders, whereby thelower enga,lg

surfaces of the bolt head When-in supp Jed position are longer than the recessed iter ruption in the supporting shoulder-'3, and wherebythe bolt'can be removed i' insert onlyrby inclining it in a t lengthwise of the .shoulders and Wi i ing'the opposite` edges of the bei, obliquely through the lsaid recesses. ln testimony whereofhaye sig name'to this specilication in he pre two subscribing Witnesses. j

' V WI-LLAM 'lll ENGLSH. lVitnesses:v

GEORGE M.' CUsHrNc, DELLA M.'CLEvEs. 

